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Check Engine Light-Coolant Temp Sensor-AGAIN!!!!!!!!!! 200 1993

posted by  Art Benstein on  Wed Sep 29 13:27 CST 2010
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

I don't blame you for being a bit skeptical. I am skeptical myself about the original diagnosis -- those sensors don't really "go bad" without some obvious physical signs, of which you have mentioned nothing. But the teflon has to go, even though perhaps you screwed it in tight enough to cut through it and allow the ground a good connection.

The code does point very specifically to the sensor. I would have approached it the way you first intended -- measuring the voltage at the ECU as directed in one of the FAQ entries. That way you get first hand verification of what the ECU is complaining about. And you are including the harness and connector in your test.

When you remove the sensor to take off the tape, use a good light to inspect the connector's contacts for corrosion.
--
Art Benstein near Baltimore

If you pick up a starving dog and make him prosperous, he will not bite you; that is the principal difference between a dog and a man. -Mark Twain






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